470 likes | 597 Views
Preservation Projects 2014-2019 Proposed Highway Improvement program. Paula J. Trigg, County Engineer Public Works and Transportation Committee April 30, 2014. Presentation Schedule: 2014-2019 5-year Highway Improvement Program. 2014-2019 Five Year Highway Improvement Program.
E N D
Preservation Projects2014-2019 Proposed Highway Improvement program Paula J. Trigg, County Engineer Public Works and Transportation Committee April 30, 2014
Presentation Schedule:2014-2019 5-year Highway Improvement Program
2014-2019 Five Year Highway Improvement Program LCDOT’s management philosophy sets system priorities: • Preservation • Modernization • Expansion
Priority One: Preservation • Developing a set of projects • ARGUS Pavement Management Software • Keeping tabs on the system • Asset Inventories • $1.6 billion to build
Developing the Project Set ARGUS Pavement Management System Today is an overview of ARGUS
Pavement Management Goal: Make cost effective decisions For given 5 year budget levels: Where repairs are needed What repair strategies to use When the repairs should be done
Pavement Management System Components: County highway database Automated pavement testing Repair strategies with costs Pavement aging prediction Optimization program
County Highway Database Contains information on: • Surface type • Surface width • Section area • Traffic volumes • Percentage of trucks
Automated Pavement Testing About 870lane miles in system County is divided into quadrants One quadrant is tested each year Entire county is covered in four years
Automated Pavement Testing First:Laser Road Surface Tester (RST) measures… Cracking Rutting Ride quality
Second: Dynaflect deflection tester measures strength and condition of… Pavement Subgrade Automated Pavement Testing
Repair Strategies and Costs Two Groups of Roadway Priorities: (starting with 2010-2014 program analysis) Four lane roads: 53miles Two lane roads: 247miles
Repair Strategies and Costs Microsurfacing Five resurfacing strategies Three “3R” strategies Three reconstruction strategies Associated per-square-yard costs
ARGUS Summary Pavement Management System does… Assess the present condition of the system Estimate future road conditions Identify and rank road projects Maximize the condition of the system within the given budget
ARGUS Summary Pavement Management System does not… Replace professional judgment Provide certain detailed project-specific information
LCDOT ARGUS results Started in 1986 System condition has improved from a rating of68to 84 (on 100 scale) Area of backlog and failing pavement has beenreducedfrom 55% to 9%
2014 – 2019 Proposed Highway Improvement Program The following charts to appear in Section 2 Preservation Projects
Definitions of Pavement Condition Good (80 – 100)Sections may require crack sealing or a thin overlay. These sections do not require immediate attention. Pavement in this category is generally less than 12 years old. Satisfactory (70-79)Sections may require resurfacing or other rehabilitation in the near future. Pavement is generally 12-14 years old. Failing (60-69)Will require some type of improvement in the near future to preserve the usability of the surface and avoid the need for reconstruction. This is pavement that is approaching the end of its useable life. Backlog (10-59)May require surface and base course reconstruction to restore roadway serviceability. Some may require total reconstruction, including reconstruction of the subgrade. Pavement in this category is generally more than 15 years old.
Keeping Tabs on the System:Asset Inventories Pavement and bike facilities Guardrail, bridges and railroad crossings Signals and signs Drainage and stormwater facilities More…
Inventory: Signs *signs installed and maintained by LCDOT | April 2014
Priority One: Preservation • Developing a set of projects • ARGUS Pavement Management Software • Keeping tabs on the system • Asset Inventories
Presentation Schedule:2014-2019 5-year Highway Improvement Program